George Zimmerman has been charged with second-degree murder in the shooting death of Trayvon Martin in Sanford, Fla. The six-woman jury will hear opening statements on Monday.

Written by

YAMICHE ALCINDOR
USA Today / Gannett

SANFORD, Fla. -- The jury hearing George Zimmerman's second-degree murder trial will not hear from a state voice expert who says Trayvon Martin screamed "stop" before being shot, a judge ruled Saturday.

Circuit Judge Debra Nelson's ruling prevents two state experts from testifying. The experts say a voice heard screaming in the background of a 911 call just before the shooting belonged to Trayvon, 17.

"There is no evidence to establish that their scientific techniques have been tested and found reliable," Nelson wrote of the prosecution's experts. ...